10836209781 has 8 divisors (see below), whose sum is σ = 16053644160. Its totient is φ = 7224139836.

The previous prime is 10836209779. The next prime is 10836209801. The reversal of 10836209781 is 18790263801.

10836209781 is a `hidden beast` number, since 10 + 8 + 3 + 620 + 9 + 7 + 8 + 1 = 666.

10836209781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10836209781 - 2¹ = 10836209779 is a prime.

It is a super-2 number, since 2×10836209781² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10836209701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200670525 + ... + 200670578.

It is an arithmetic number, because the mean of its divisors is an integer number (2006705520).

Almost surely, 2^10836209781 is an apocalyptic number.

It is an amenable number.

10836209781 is a deficient number, since it is larger than the sum of its proper divisors (5217434379).

10836209781 is an equidigital number, since it uses as much as digits as its factorization.

10836209781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401341112 (or 401341106 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The spelling of 10836209781 in words is "ten billion, eight hundred thirty-six million, two hundred nine thousand, seven hundred eighty-one".